The report surveys the types of vegetation considered to be endangered in the short and long term. Seventyone types of vegetation and 68 subtypes of these are described with respect to their ecology, species composition, occurrence of Red List species of vascular plants and bryophytes, regional and local subtypes, threats, changes and declines, and other factors such as their need for management and their representation in protected areas. The vegetation types and subtypes are described in varying detail, partly depending on the knowledge available about them. They are arranged in 10 groups: woodland vegetation, scree, rock and woodland border vegetation, anthropogenous grassland vegetation (including four complex types), coastal heath vegetation, mire vegetation, spring vegetation, freshwater shore and aquatic vegetation, pioneer alluvial vegetation, alpine vegetation and seashore vegetation. The threats facing each type and subtype are evaluated using the categories of threat employed by the IUCN. Significant variations are found within each group, from types that are critically endangered (CR) or endangered (EN) to those in the vulnerable (VU) or in the lower risk (LR) categories. Descriptions and assessments are based on published and unpublished material, and 18 Norwegian botanists have supplied the "existing knowledge". Satisfactory documentation of regional and local subtypes, distribution and current trends is lacking for many types and subtypes. More knowledge about some groups is urgently needed, particularly anthropogenous grasslands, and this can be achieved in part by compiling existing, largely unpublished, information. Twelve types and subtypes of vegetation are considered to be critically endangered in Norway, three times as many are endangered, and the majority are either vulnerable or in the lower risk category.